Mmmm... I think you're wrong. In fact, the US FDA limits the size of implants to 800-1000cc and only allows saline to be used. That's the size of any average big boob model. Nothing too spectacular if you're really into big boobs. Also if you decide to overfill those implants to 1200-1400cc, the result are pretty obvious, round, highly projected and hard looking boobs. Way different than Jordan's.
Most models wanting to get a bigger size have to come to Europe to get them custom made, since here we don't have such limits. Also if you decide to have your surgery done here too, you can even choose silicone cohesive gel implants, forbidden in the US and known no have a much softer feel compared to saline. I'm not saying those are the ones Jordan has. Saline implants can have a soft feel too.
You just have to go and search for Penelope Black Diamond or Beshine. Both german and, if I'm not mistaken, both with (multiple) surgeries done in Germany by german doctors. Having said that, I'm fairly sure Jordan had her surgery done in Germany too.